A New Approach to Carbonate Alkalinity

• 作者: Agnieszka Dobkowska Agustin G. Asuero Anna M. Micha?owska-Kaczmarczyk Bogus?aw Pilarski Monika Lewandowska Tadeusz Micha?owski
• 来源期刊: 分析科学方法和仪器期刊(英文)
• 学科: 化学
• 关键词: CARBONATE ALKALINITY PH TITRATION MATHEMATICAL MODELLING
• 年，卷（期）: 2014,（2）
• 页码范围: 62-69
• 页数: 8页
• 分类号: O6

摘要

The article provides experimental data applied to the determination of carbonate alkalinity (CAM) according to modified Gran II functions. CAM is related to the mixtures NaHCO3 + Na2CO3 and Na2CO3 + NaOH. In addition to the determination of equivalence volumes, one of the main novelties of the proposed method is the possibility of determining the activity coefficient of hydrogen ions (γ). Moreover, CAM can be used to calculate the dissociation constants (K1, K2) for carbonic acid and the ionic product of water (KW) from a single pH titration curve. The parameters of the related functions are calculated according to the least squares method.